<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <title>+=</title>
    <link rel="stylesheet" type="text/css" href="csound.css" />
    <meta name="generator" content="DocBook XSL Stylesheets V1.78.1" />
    <link rel="home" href="index.html" title="The Canonical Csound Reference Manual" />
    <link rel="up" href="OpcodesTop.html" title="Orchestra Opcodes and Operators" />
    <link rel="prev" href="assign.html" title="=" />
    <link rel="next" href="equals.html" title="==" />
  </head>
  <body>
    <div class="navheader">
      <table width="100%" summary="Navigation header">
        <tr>
          <th colspan="3" align="center">+=</th>
        </tr>
        <tr>
          <td width="20%" align="left"><a accesskey="p" href="assign.html">Prev</a> </td>
          <th width="60%" align="center">Orchestra Opcodes and Operators</th>
          <td width="20%" align="right"> <a accesskey="n" href="equals.html">Next</a></td>
        </tr>
      </table>
      <hr />
    </div>
    <div class="refentry">
      <a id="plusbecomes"></a>
      <div class="titlepage"></div>
      <a id="IndexPlusbecomes" class="indexterm"></a>
      <div class="refnamediv">
        <h2>
          <span class="refentrytitle">+=</span>
        </h2>
        <p>+= — 
       Performs add and assignment.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp88450128"></a>
        <h2>Syntax</h2>
        <pre class="synopsis">ares <span class="command"><strong>+=</strong></span> xarg</pre>
        <pre class="synopsis">ires <span class="command"><strong>+=</strong></span> iarg</pre>
        <pre class="synopsis">kres <span class="command"><strong>+=</strong></span> karg</pre>
        <pre class="synopsis">table [ kval] <span class="command"><strong>+=</strong></span> karg</pre>
      </div>
      <div class="refsect1">
        <a id="idp88456336"></a>
        <h2>Description</h2>
        <p> 
      Performs an add and assign.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp88457664"></a>
        <h2>Initialization</h2>
        <p> 
      <span class="emphasis"><em>+=</em></span> - Adds the value of the expression
      <span class="emphasis"><em>iarg</em></span> (<span class="emphasis"><em>karg, xarg</em></span>) into
      the named result. This provides a means of saving an evaluated
      result for later use.  
    </p>
      </div>
      <div class="refsect1">
        <a id="idp88460416"></a>
        <h2>Examples</h2>
        <p>
      Here is an example of the plusbecomes opcode. It uses the file <a class="ulink" href="examples/reverb.csd" target="_top"><em class="citetitle">reverb.csd</em></a>.

      </p>
        <div class="example">
          <a id="idp88462272"></a>
          <p class="title">
            <strong>Example 31. Example of the plusbecomes opcode.</strong>
          </p>
          <div class="example-contents">
            <p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
            <pre class="programlisting">
<span class="csdtag">&lt;CsoundSynthesizer&gt;</span>
<span class="csdtag">&lt;CsOptions&gt;</span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac   <span class="comment">;;;realtime audio out</span>
<span class="comment">;-iadc    ;;;uncomment -iadc if realtime audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o reverb.wav -W ;;; for file output any platform</span>
<span class="csdtag">&lt;/CsOptions&gt;</span>
<span class="csdtag">&lt;CsInstruments&gt;</span>

<span class="ohdr">sr</span> <span class="op">=</span> 44100 
<span class="ohdr">ksmps</span> <span class="op">=</span> 32 
<span class="ohdr">0dbfs</span>  <span class="op">=</span> 1 
<span class="ohdr">nchnls</span> <span class="op">=</span> 2

ga1 <span class="opc">init</span> 0 

<span class="oblock">instr</span> 1 

asig <span class="opc">poscil</span> .2, <span class="opc">cpspch</span>(p4), 1 
     <span class="opc">outs</span> asig, asig 

ga1  <span class="op">+</span><span class="op">=</span> asig     <span class="comment">;add direct signal to global reverb</span>
 
<span class="oblock">endin</span>

<span class="oblock">instr</span> 99	<span class="comment">;(highest instr number executed last)</span>

arev <span class="opc">reverb</span> ga1, 1.5
     <span class="opc">outs</span> arev, arev 
  
ga1  <span class="op">=</span> 0	<span class="comment">;clear</span>
<span class="oblock">endin</span>


<span class="csdtag">&lt;/CsInstruments&gt;</span>
<span class="csdtag">&lt;CsScore&gt;</span>
<span class="stamnt">f</span> 1 0 128 10 1	<span class="comment">;sine</span>

<span class="stamnt">i</span> 1 0 0.1 7.00	<span class="comment">;short sounds</span>
<span class="stamnt">i</span> 1 1 0.1 8.02
<span class="stamnt">i</span> 1 2 0.1 8.04
<span class="stamnt">i</span> 1 3 0.1 8.06

<span class="stamnt">i</span> 99 0 6	<span class="comment">;reverb runs for 6 seconds</span>
<span class="stamnt">e</span>
<span class="csdtag">&lt;/CsScore&gt;</span>
<span class="csdtag">&lt;/CsoundSynthesizer&gt;</span>
</pre>
          </div>
        </div>
        <p><br class="example-break" />

    </p>
      </div>
      <div class="refsect1">
        <a id="idp88466592"></a>
        <h2>See Also</h2>
        <p>
      <a class="link" href="assign.html" title="="><em class="citetitle">assign</em></a>, 
    </p>
      </div>
      <div class="refsect1">
        <a id="idp88468768"></a>
        <h2>Credits</h2>
        <table border="0" summary="Simple list" class="simplelist">
          <tr>
            <td>Author: John ffitch</td>
          </tr>
          <tr>
            <td>University of Bath, and Codemist Ltd.</td>
          </tr>
          <tr>
            <td>Bath, UK</td>
          </tr>
          <tr>
            <td>2013</td>
          </tr>
        </table>
        <p>New in version 6.00</p>
      </div>
    </div>
    <div class="navfooter">
      <hr />
      <table width="100%" summary="Navigation footer">
        <tr>
          <td width="40%" align="left"><a accesskey="p" href="assign.html">Prev</a> </td>
          <td width="20%" align="center">
            <a accesskey="u" href="OpcodesTop.html">Up</a>
          </td>
          <td width="40%" align="right"> <a accesskey="n" href="equals.html">Next</a></td>
        </tr>
        <tr>
          <td width="40%" align="left" valign="top">= </td>
          <td width="20%" align="center">
            <a accesskey="h" href="index.html">Home</a>
          </td>
          <td width="40%" align="right" valign="top"> ==</td>
        </tr>
      </table>
    </div>
  </body>
</html>
